Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 4083:44c1953c266c
Cleaned up links.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Thu, 08 Sep 2011 13:27:18 +0000 |
parents | 37da005a5808 |
children | efeee901439a |
rev | line source |
---|---|
1453 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_event.h> | |
10 | |
11 | |
12 /* | |
13 * open file cache caches | |
14 * open file handles with stat() info; | |
15 * directories stat() info; | |
16 * files and directories errors: not found, access denied, etc. | |
17 */ | |
18 | |
19 | |
3178 | 20 #define NGX_MIN_READ_AHEAD (128 * 1024) |
21 | |
22 | |
1453 | 23 static void ngx_open_file_cache_cleanup(void *data); |
1775 | 24 static ngx_int_t ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, |
25 ngx_log_t *log); | |
26 static void ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
27 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log); | |
1453 | 28 static void ngx_open_file_cleanup(void *data); |
29 static void ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 30 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log); |
1775 | 31 static void ngx_open_file_del_event(ngx_cached_open_file_t *file); |
1453 | 32 static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, |
33 ngx_uint_t n, ngx_log_t *log); | |
34 static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
35 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
1775 | 36 static ngx_cached_open_file_t * |
37 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
38 uint32_t hash); | |
1453 | 39 static void ngx_open_file_cache_remove(ngx_event_t *ev); |
40 | |
41 | |
42 ngx_open_file_cache_t * | |
43 ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive) | |
44 { | |
45 ngx_pool_cleanup_t *cln; | |
46 ngx_open_file_cache_t *cache; | |
47 | |
48 cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t)); | |
49 if (cache == NULL) { | |
50 return NULL; | |
51 } | |
52 | |
1761 | 53 ngx_rbtree_init(&cache->rbtree, &cache->sentinel, |
1743
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54 ngx_open_file_cache_rbtree_insert_value); |
1453 | 55 |
1765 | 56 ngx_queue_init(&cache->expire_queue); |
57 | |
1453 | 58 cache->current = 0; |
59 cache->max = max; | |
60 cache->inactive = inactive; | |
61 | |
62 cln = ngx_pool_cleanup_add(pool, 0); | |
63 if (cln == NULL) { | |
64 return NULL; | |
65 } | |
66 | |
67 cln->handler = ngx_open_file_cache_cleanup; | |
68 cln->data = cache; | |
69 | |
70 return cache; | |
71 } | |
72 | |
73 | |
74 static void | |
75 ngx_open_file_cache_cleanup(void *data) | |
76 { | |
77 ngx_open_file_cache_t *cache = data; | |
78 | |
1765 | 79 ngx_queue_t *q; |
1453 | 80 ngx_cached_open_file_t *file; |
81 | |
82 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
83 "open file cache cleanup"); | |
84 | |
85 for ( ;; ) { | |
86 | |
1765 | 87 if (ngx_queue_empty(&cache->expire_queue)) { |
1766 | 88 break; |
1453 | 89 } |
90 | |
1765 | 91 q = ngx_queue_last(&cache->expire_queue); |
92 | |
93 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
94 | |
95 ngx_queue_remove(q); | |
1453 | 96 |
97 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
98 | |
99 cache->current--; | |
100 | |
101 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
102 "delete cached open file: %s", file->name); | |
103 | |
104 if (!file->err && !file->is_dir) { | |
105 file->close = 1; | |
106 file->count = 0; | |
1772 | 107 ngx_close_cached_file(cache, file, 0, ngx_cycle->log); |
1453 | 108 |
109 } else { | |
110 ngx_free(file->name); | |
111 ngx_free(file); | |
112 } | |
113 } | |
114 | |
115 if (cache->current) { | |
116 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
117 "%d items still leave in open file cache", | |
118 cache->current); | |
119 } | |
120 | |
121 if (cache->rbtree.root != cache->rbtree.sentinel) { | |
122 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
123 "rbtree still is not empty in open file cache"); | |
124 | |
125 } | |
126 } | |
127 | |
128 | |
129 ngx_int_t | |
130 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
131 ngx_open_file_info_t *of, ngx_pool_t *pool) | |
132 { | |
133 time_t now; | |
134 uint32_t hash; | |
135 ngx_int_t rc; | |
2756
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*) of.test_only to not open file if only stat() is enough
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136 ngx_file_info_t fi; |
1453 | 137 ngx_pool_cleanup_t *cln; |
138 ngx_cached_open_file_t *file; | |
139 ngx_pool_cleanup_file_t *clnf; | |
140 ngx_open_file_cache_cleanup_t *ofcln; | |
141 | |
2069
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use ngx_file_info() and test uniq if file is already open
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142 of->fd = NGX_INVALID_FILE; |
1453 | 143 of->err = 0; |
144 | |
145 if (cache == NULL) { | |
146 | |
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147 if (of->test_only) { |
09cab3f8d92e
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148 |
2782
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149 if (ngx_file_info(name->data, &fi) == NGX_FILE_ERROR) { |
2756
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150 of->err = ngx_errno; |
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151 of->failed = ngx_file_info_n; |
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152 return NGX_ERROR; |
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*) of.test_only to not open file if only stat() is enough
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153 } |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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154 |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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155 of->uniq = ngx_file_uniq(&fi); |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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156 of->mtime = ngx_file_mtime(&fi); |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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157 of->size = ngx_file_size(&fi); |
3899
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Use more precise stat.st_blocks to account cache size on Unix
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158 of->fs_size = ngx_file_fs_size(&fi); |
2756
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*) of.test_only to not open file if only stat() is enough
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159 of->is_dir = ngx_is_dir(&fi); |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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160 of->is_file = ngx_is_file(&fi); |
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*) of.test_only to not open file if only stat() is enough
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161 of->is_link = ngx_is_link(&fi); |
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*) of.test_only to not open file if only stat() is enough
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162 of->is_exec = ngx_is_exec(&fi); |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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163 |
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*) of.test_only to not open file if only stat() is enough
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164 return NGX_OK; |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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165 } |
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
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166 |
1453 | 167 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); |
168 if (cln == NULL) { | |
169 return NGX_ERROR; | |
170 } | |
171 | |
172 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
173 | |
174 if (rc == NGX_OK && !of->is_dir) { | |
175 cln->handler = ngx_pool_cleanup_file; | |
176 clnf = cln->data; | |
177 | |
178 clnf->fd = of->fd; | |
179 clnf->name = name->data; | |
180 clnf->log = pool->log; | |
181 } | |
182 | |
183 return rc; | |
184 } | |
185 | |
186 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
187 if (cln == NULL) { | |
188 return NGX_ERROR; | |
189 } | |
190 | |
191 now = ngx_time(); | |
192 | |
1775 | 193 hash = ngx_crc32_long(name->data, name->len); |
194 | |
195 file = ngx_open_file_lookup(cache, name, hash); | |
196 | |
197 if (file) { | |
198 | |
199 file->uses++; | |
200 | |
1987 | 201 ngx_queue_remove(&file->queue); |
202 | |
1775 | 203 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) { |
204 | |
205 /* file was not used often enough to keep open */ | |
206 | |
207 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
1453 | 208 |
1775 | 209 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
210 goto failed; | |
211 } | |
212 | |
213 goto add_event; | |
1453 | 214 } |
215 | |
2070 | 216 if (file->use_event |
2063
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
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217 || (file->event == NULL |
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
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218 && (of->uniq == 0 || of->uniq == file->uniq) |
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
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parents:
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219 && now - file->created < of->valid)) |
1775 | 220 { |
221 if (file->err == 0) { | |
1772 | 222 |
1775 | 223 of->fd = file->fd; |
224 of->uniq = file->uniq; | |
225 of->mtime = file->mtime; | |
226 of->size = file->size; | |
1453 | 227 |
1775 | 228 of->is_dir = file->is_dir; |
229 of->is_file = file->is_file; | |
230 of->is_link = file->is_link; | |
231 of->is_exec = file->is_exec; | |
2246
987831d73bd8
cache directio flag in open file cache
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232 of->is_directio = file->is_directio; |
1453 | 233 |
1775 | 234 if (!file->is_dir) { |
235 file->count++; | |
236 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 237 } |
238 | |
1775 | 239 } else { |
240 of->err = file->err; | |
2783
87c088e6956a
set of.failed for cached error, the bug has been introduced in r2757
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241 of->failed = ngx_open_file_n; |
1775 | 242 } |
243 | |
244 goto found; | |
245 } | |
246 | |
247 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
248 "retest open file: %s, fd:%d, c:%d, e:%d", | |
249 file->name, file->fd, file->count, file->err); | |
1453 | 250 |
1775 | 251 if (file->is_dir) { |
252 | |
253 /* | |
254 * chances that directory became file are very small | |
255 * so test_dir flag allows to use a single syscall | |
256 * in ngx_file_info() instead of three syscalls | |
257 */ | |
258 | |
259 of->test_dir = 1; | |
260 } | |
261 | |
2069
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use ngx_file_info() and test uniq if file is already open
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262 of->fd = file->fd; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
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263 of->uniq = file->uniq; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
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264 |
1775 | 265 rc = ngx_open_and_stat_file(name->data, of, pool->log); |
1453 | 266 |
1775 | 267 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
268 goto failed; | |
269 } | |
270 | |
271 if (of->is_dir) { | |
272 | |
273 if (file->is_dir || file->err) { | |
274 goto update; | |
275 } | |
276 | |
277 /* file became directory */ | |
1453 | 278 |
1775 | 279 } else if (of->err == 0) { /* file */ |
280 | |
281 if (file->is_dir || file->err) { | |
282 goto add_event; | |
283 } | |
1453 | 284 |
2070 | 285 if (of->uniq == file->uniq) { |
1453 | 286 |
1775 | 287 file->count++; |
1453 | 288 |
1775 | 289 if (file->event) { |
290 file->use_event = 1; | |
1453 | 291 } |
292 | |
4076
37da005a5808
Bugfix: open_file_cache lost is_directio flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
3899
diff
changeset
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293 of->is_directio = file->is_directio; |
37da005a5808
Bugfix: open_file_cache lost is_directio flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
3899
diff
changeset
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294 |
1775 | 295 goto renew; |
296 } | |
1453 | 297 |
1775 | 298 /* file was changed */ |
1453 | 299 |
1775 | 300 } else { /* error to cache */ |
1453 | 301 |
1775 | 302 if (file->err || file->is_dir) { |
303 goto update; | |
1453 | 304 } |
305 | |
1775 | 306 /* file was removed, etc. */ |
307 } | |
308 | |
309 if (file->count == 0) { | |
310 | |
311 ngx_open_file_del_event(file); | |
1453 | 312 |
1775 | 313 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
314 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
315 ngx_close_file_n " \"%s\" failed", | |
316 name->data); | |
317 } | |
1453 | 318 |
1775 | 319 goto add_event; |
320 } | |
321 | |
322 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
323 | |
324 cache->current--; | |
325 | |
326 file->close = 1; | |
327 | |
328 goto create; | |
1453 | 329 } |
330 | |
331 /* not found */ | |
332 | |
333 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
334 | |
335 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
336 goto failed; | |
337 } | |
338 | |
339 create: | |
340 | |
341 if (cache->current >= cache->max) { | |
342 ngx_expire_old_cached_files(cache, 0, pool->log); | |
343 } | |
344 | |
345 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
346 | |
347 if (file == NULL) { | |
348 goto failed; | |
349 } | |
350 | |
351 file->name = ngx_alloc(name->len + 1, pool->log); | |
352 | |
353 if (file->name == NULL) { | |
354 ngx_free(file); | |
355 file = NULL; | |
356 goto failed; | |
357 } | |
358 | |
359 ngx_cpystrn(file->name, name->data, name->len + 1); | |
360 | |
361 file->node.key = hash; | |
362 | |
363 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
364 | |
365 cache->current++; | |
366 | |
1775 | 367 file->uses = 1; |
1453 | 368 file->count = 0; |
2934
b6d588fa3ee9
initialize use_event field in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2783
diff
changeset
|
369 file->use_event = 0; |
1775 | 370 file->event = NULL; |
371 | |
372 add_event: | |
373 | |
374 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 375 |
376 update: | |
377 | |
378 file->fd = of->fd; | |
379 file->err = of->err; | |
380 | |
381 if (of->err == 0) { | |
382 file->uniq = of->uniq; | |
383 file->mtime = of->mtime; | |
384 file->size = of->size; | |
385 | |
386 file->close = 0; | |
387 | |
388 file->is_dir = of->is_dir; | |
389 file->is_file = of->is_file; | |
390 file->is_link = of->is_link; | |
391 file->is_exec = of->is_exec; | |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
392 file->is_directio = of->is_directio; |
1453 | 393 |
394 if (!of->is_dir) { | |
395 file->count++; | |
396 } | |
397 } | |
398 | |
399 renew: | |
400 | |
401 file->created = now; | |
402 | |
403 found: | |
404 | |
405 file->accessed = now; | |
406 | |
1765 | 407 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 408 |
1772 | 409 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0, |
410 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d", | |
411 file->name, file->fd, file->count, file->err, file->uses); | |
1453 | 412 |
413 if (of->err == 0) { | |
414 | |
415 if (!of->is_dir) { | |
416 cln->handler = ngx_open_file_cleanup; | |
417 ofcln = cln->data; | |
418 | |
419 ofcln->cache = cache; | |
420 ofcln->file = file; | |
1772 | 421 ofcln->min_uses = of->min_uses; |
1453 | 422 ofcln->log = pool->log; |
423 } | |
424 | |
425 return NGX_OK; | |
426 } | |
427 | |
428 return NGX_ERROR; | |
429 | |
430 failed: | |
431 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
432 if (file) { |
1453 | 433 ngx_rbtree_delete(&cache->rbtree, &file->node); |
434 | |
435 cache->current--; | |
436 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
437 if (file->count == 0) { |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
438 |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
439 if (file->fd != NGX_INVALID_FILE) { |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
440 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
441 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
442 ngx_close_file_n " \"%s\" failed", |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
443 file->name); |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
444 } |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
445 } |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
446 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
447 ngx_free(file->name); |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
448 ngx_free(file); |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
449 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
450 } else { |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
451 file->close = 1; |
1453 | 452 } |
453 } | |
454 | |
455 if (of->fd != NGX_INVALID_FILE) { | |
456 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
457 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
458 ngx_close_file_n " \"%s\" failed", name->data); | |
459 } | |
460 } | |
461 | |
462 return NGX_ERROR; | |
463 } | |
464 | |
465 | |
466 static ngx_int_t | |
467 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
468 { | |
469 ngx_fd_t fd; | |
470 ngx_file_info_t fi; | |
471 | |
2070 | 472 if (of->fd != NGX_INVALID_FILE) { |
1453 | 473 |
2782
4bd7825fab80
uniform ngx_file_info() interface with ngx_fd_info()
Igor Sysoev <igor@sysoev.ru>
parents:
2756
diff
changeset
|
474 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) { |
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
475 of->failed = ngx_file_info_n; |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
476 goto failed; |
1453 | 477 } |
478 | |
2070 | 479 if (of->uniq == ngx_file_uniq(&fi)) { |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
480 goto done; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
481 } |
1453 | 482 |
2070 | 483 } else if (of->test_dir) { |
484 | |
2782
4bd7825fab80
uniform ngx_file_info() interface with ngx_fd_info()
Igor Sysoev <igor@sysoev.ru>
parents:
2756
diff
changeset
|
485 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) { |
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
486 of->failed = ngx_file_info_n; |
2070 | 487 goto failed; |
488 } | |
489 | |
2460
225fa4abd76f
test ngx_file_info() result, the bug has been introduced in r2070
Igor Sysoev <igor@sysoev.ru>
parents:
2246
diff
changeset
|
490 if (ngx_is_dir(&fi)) { |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
491 goto done; |
1453 | 492 } |
493 } | |
494 | |
2072 | 495 if (!of->log) { |
3497
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
496 |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
497 /* |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
498 * Use non-blocking open() not to hang on FIFO files, etc. |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
499 * This flag has no effect on a regular files. |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
500 */ |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
501 |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
502 fd = ngx_open_file(name, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK, |
ac281bc4c187
use non-blocking open() not to hang on FIFO files, etc.
Igor Sysoev <igor@sysoev.ru>
parents:
3178
diff
changeset
|
503 NGX_FILE_OPEN, 0); |
2072 | 504 |
505 } else { | |
2629
367b29612a00
Win32 appends synchronized if only FILE_APPEND_DATA and SYNCHRONIZE are set
Igor Sysoev <igor@sysoev.ru>
parents:
2628
diff
changeset
|
506 fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN, |
367b29612a00
Win32 appends synchronized if only FILE_APPEND_DATA and SYNCHRONIZE are set
Igor Sysoev <igor@sysoev.ru>
parents:
2628
diff
changeset
|
507 NGX_FILE_DEFAULT_ACCESS); |
2072 | 508 } |
1453 | 509 |
510 if (fd == NGX_INVALID_FILE) { | |
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
511 of->failed = ngx_open_file_n; |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
512 goto failed; |
1453 | 513 } |
514 | |
515 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
516 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
517 ngx_fd_info_n " \"%s\" failed", name); | |
518 | |
519 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
520 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
521 ngx_close_file_n " \"%s\" failed", name); | |
522 } | |
523 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
524 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
525 |
1453 | 526 return NGX_ERROR; |
527 } | |
528 | |
529 if (ngx_is_dir(&fi)) { | |
530 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
531 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
532 ngx_close_file_n " \"%s\" failed", name); | |
533 } | |
534 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
535 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
536 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
537 } else { |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
538 of->fd = fd; |
2129 | 539 |
3178 | 540 if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) { |
541 if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) { | |
542 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
543 ngx_read_ahead_n " \"%s\" failed", name); | |
544 } | |
545 } | |
546 | |
2129 | 547 if (of->directio <= ngx_file_size(&fi)) { |
3164
b1b1775698d5
uniform ngx_directio_on/off() interface with other file functions
Igor Sysoev <igor@sysoev.ru>
parents:
2934
diff
changeset
|
548 if (ngx_directio_on(fd) == NGX_FILE_ERROR) { |
2129 | 549 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
550 ngx_directio_on_n " \"%s\" failed", name); |
2231
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
551 |
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
552 } else { |
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
553 of->is_directio = 1; |
2129 | 554 } |
555 } | |
1453 | 556 } |
557 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
558 done: |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
559 |
1453 | 560 of->uniq = ngx_file_uniq(&fi); |
561 of->mtime = ngx_file_mtime(&fi); | |
562 of->size = ngx_file_size(&fi); | |
3899
e7cd13b7f759
Use more precise stat.st_blocks to account cache size on Unix
Igor Sysoev <igor@sysoev.ru>
parents:
3497
diff
changeset
|
563 of->fs_size = ngx_file_fs_size(&fi); |
1453 | 564 of->is_dir = ngx_is_dir(&fi); |
565 of->is_file = ngx_is_file(&fi); | |
566 of->is_link = ngx_is_link(&fi); | |
567 of->is_exec = ngx_is_exec(&fi); | |
568 | |
569 return NGX_OK; | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
570 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
571 failed: |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
572 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
573 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
574 of->err = ngx_errno; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
575 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
576 return NGX_ERROR; |
1453 | 577 } |
578 | |
579 | |
1775 | 580 /* |
581 * we ignore any possible event setting error and | |
582 * fallback to usual periodic file retests | |
583 */ | |
584 | |
585 static void | |
586 ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
587 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log) | |
588 { | |
589 ngx_open_file_cache_event_t *fev; | |
590 | |
591 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT) | |
592 || !of->events | |
593 || file->event | |
594 || of->fd == NGX_INVALID_FILE | |
595 || file->uses < of->min_uses) | |
596 { | |
597 return; | |
598 } | |
599 | |
2070 | 600 file->use_event = 0; |
601 | |
1775 | 602 file->event = ngx_calloc(sizeof(ngx_event_t), log); |
603 if (file->event== NULL) { | |
604 return; | |
605 } | |
606 | |
607 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log); | |
608 if (fev == NULL) { | |
609 ngx_free(file->event); | |
610 file->event = NULL; | |
611 return; | |
612 } | |
613 | |
614 fev->fd = of->fd; | |
615 fev->file = file; | |
616 fev->cache = cache; | |
617 | |
618 file->event->handler = ngx_open_file_cache_remove; | |
619 file->event->data = fev; | |
620 | |
621 /* | |
622 * although vnode event may be called while ngx_cycle->poll | |
623 * destruction, however, cleanup procedures are run before any | |
624 * memory freeing and events will be canceled. | |
625 */ | |
626 | |
627 file->event->log = ngx_cycle->log; | |
628 | |
629 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
630 != NGX_OK) | |
631 { | |
632 ngx_free(file->event->data); | |
633 ngx_free(file->event); | |
634 file->event = NULL; | |
635 return; | |
636 } | |
637 | |
638 /* | |
2071 | 639 * we do not set file->use_event here because there may be a race |
640 * condition: a file may be deleted between opening the file and | |
641 * adding event, so we rely upon event notification only after | |
642 * one file revalidation on next file access | |
1775 | 643 */ |
644 | |
645 return; | |
646 } | |
647 | |
648 | |
1453 | 649 static void |
650 ngx_open_file_cleanup(void *data) | |
651 { | |
652 ngx_open_file_cache_cleanup_t *c = data; | |
653 | |
654 c->file->count--; | |
655 | |
1772 | 656 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
1453 | 657 |
658 /* drop one or two expired open files */ | |
659 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
660 } | |
661 | |
662 | |
663 static void | |
664 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 665 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
1453 | 666 { |
1772 | 667 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
668 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
669 file->name, file->fd, file->count, file->uses, file->close); | |
1453 | 670 |
671 if (!file->close) { | |
672 | |
673 file->accessed = ngx_time(); | |
674 | |
1765 | 675 ngx_queue_remove(&file->queue); |
1453 | 676 |
1765 | 677 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 678 |
1772 | 679 if (file->uses >= min_uses || file->count) { |
680 return; | |
681 } | |
1453 | 682 } |
683 | |
1775 | 684 ngx_open_file_del_event(file); |
1453 | 685 |
686 if (file->count) { | |
687 return; | |
688 } | |
689 | |
1772 | 690 if (file->fd != NGX_INVALID_FILE) { |
691 | |
692 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
693 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
694 ngx_close_file_n " \"%s\" failed", file->name); | |
695 } | |
696 | |
697 file->fd = NGX_INVALID_FILE; | |
698 } | |
699 | |
700 if (!file->close) { | |
701 return; | |
1453 | 702 } |
703 | |
704 ngx_free(file->name); | |
705 ngx_free(file); | |
706 } | |
707 | |
708 | |
709 static void | |
1775 | 710 ngx_open_file_del_event(ngx_cached_open_file_t *file) |
711 { | |
712 if (file->event == NULL) { | |
713 return; | |
714 } | |
715 | |
716 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
717 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
718 | |
719 ngx_free(file->event->data); | |
720 ngx_free(file->event); | |
721 file->event = NULL; | |
722 file->use_event = 0; | |
723 } | |
724 | |
725 | |
726 static void | |
1453 | 727 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, |
728 ngx_log_t *log) | |
729 { | |
730 time_t now; | |
1765 | 731 ngx_queue_t *q; |
1453 | 732 ngx_cached_open_file_t *file; |
733 | |
734 now = ngx_time(); | |
735 | |
736 /* | |
737 * n == 1 deletes one or two inactive files | |
738 * n == 0 deletes least recently used file by force | |
739 * and one or two inactive files | |
740 */ | |
741 | |
742 while (n < 3) { | |
743 | |
1765 | 744 if (ngx_queue_empty(&cache->expire_queue)) { |
1453 | 745 return; |
746 } | |
747 | |
1765 | 748 q = ngx_queue_last(&cache->expire_queue); |
749 | |
750 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
751 | |
1453 | 752 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
753 return; | |
754 } | |
755 | |
1765 | 756 ngx_queue_remove(q); |
1453 | 757 |
758 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
759 | |
760 cache->current--; | |
761 | |
762 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
763 "expire cached open file: %s", file->name); | |
764 | |
765 if (!file->err && !file->is_dir) { | |
766 file->close = 1; | |
1772 | 767 ngx_close_cached_file(cache, file, 0, log); |
1453 | 768 |
769 } else { | |
770 ngx_free(file->name); | |
771 ngx_free(file); | |
772 } | |
773 } | |
774 } | |
775 | |
776 | |
777 static void | |
778 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
779 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
780 { | |
781 ngx_rbtree_node_t **p; | |
782 ngx_cached_open_file_t *file, *file_temp; | |
783 | |
784 for ( ;; ) { | |
785 | |
786 if (node->key < temp->key) { | |
787 | |
788 p = &temp->left; | |
789 | |
790 } else if (node->key > temp->key) { | |
791 | |
792 p = &temp->right; | |
793 | |
794 } else { /* node->key == temp->key */ | |
795 | |
796 file = (ngx_cached_open_file_t *) node; | |
797 file_temp = (ngx_cached_open_file_t *) temp; | |
798 | |
799 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
800 ? &temp->left : &temp->right; | |
801 } | |
802 | |
803 if (*p == sentinel) { | |
804 break; | |
805 } | |
806 | |
807 temp = *p; | |
808 } | |
809 | |
810 *p = node; | |
811 node->parent = temp; | |
812 node->left = sentinel; | |
813 node->right = sentinel; | |
814 ngx_rbt_red(node); | |
815 } | |
816 | |
817 | |
1775 | 818 static ngx_cached_open_file_t * |
819 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
820 uint32_t hash) | |
821 { | |
822 ngx_int_t rc; | |
823 ngx_rbtree_node_t *node, *sentinel; | |
824 ngx_cached_open_file_t *file; | |
825 | |
826 node = cache->rbtree.root; | |
827 sentinel = cache->rbtree.sentinel; | |
828 | |
829 while (node != sentinel) { | |
830 | |
831 if (hash < node->key) { | |
832 node = node->left; | |
833 continue; | |
834 } | |
835 | |
836 if (hash > node->key) { | |
837 node = node->right; | |
838 continue; | |
839 } | |
840 | |
841 /* hash == node->key */ | |
842 | |
843 do { | |
844 file = (ngx_cached_open_file_t *) node; | |
845 | |
846 rc = ngx_strcmp(name->data, file->name); | |
847 | |
848 if (rc == 0) { | |
849 return file; | |
850 } | |
851 | |
852 node = (rc < 0) ? node->left : node->right; | |
853 | |
854 } while (node != sentinel && hash == node->key); | |
855 | |
856 break; | |
857 } | |
858 | |
859 return NULL; | |
860 } | |
861 | |
862 | |
1453 | 863 static void |
864 ngx_open_file_cache_remove(ngx_event_t *ev) | |
865 { | |
866 ngx_cached_open_file_t *file; | |
867 ngx_open_file_cache_event_t *fev; | |
868 | |
869 fev = ev->data; | |
870 file = fev->file; | |
871 | |
1765 | 872 ngx_queue_remove(&file->queue); |
1453 | 873 |
874 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
875 | |
876 fev->cache->current--; | |
877 | |
878 /* NGX_ONESHOT_EVENT was already deleted */ | |
879 file->event = NULL; | |
2070 | 880 file->use_event = 0; |
1453 | 881 |
882 file->close = 1; | |
883 | |
1772 | 884 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
1453 | 885 |
886 /* free memory only when fev->cache and fev->file are already not needed */ | |
887 | |
888 ngx_free(ev->data); | |
889 ngx_free(ev); | |
890 } |